The vaginal lining characteristically has several transverse ridges known as vaginal rugae, which permit expansion of the vaginal cavity. These tend to disappear in older women and in those women who have borne children. There are no glands in the vaginal wall. The mucus that lubricates the ...
of which is of great significance in the eventual anatomical differences between men and women. Two ducts closely related to the developing urinary system are called mesonephric, orwolffian, ducts. In males eachmesonephric ductbecomesdifferentiatedinto four related structures: a duct of theepididymis,...
Thebonesbecome lighter and more brittle because of a loss ofcalcium. This loss inbonemass is greater in women than men after the fifth decade. Injointsthecartilagecovering the ends of bone becomes thinner and sometimes disappears in spots, so bone meets bone directly and the old joints creak....